Analysis And Research On Influencing Factors Of Protrusion Of Angular Contact Ball Bearing Based On Digital Twin

Angular contact ball bearing pair is extremely strict with the structure size,in the process of single bearing projection quantity is decided to pair the first element of success,but bearing the actual production process,the internal and external ring structure size deviation and the size difference is inevitable,each other between the two bearing this diagonal contact ball bearing matching technology put forward higher requirements.The current matching technology is based on nominal size and simple calculation,which has a low matching success rate and affects the improvement of production efficiency.Aiming at this problem,this paper intends to conduct virtual assembly and pairing of actual bearing parts by digital twin technology in the combination of virtual and real,so as to improve the pairing success rate and application performance of angular contact ball bearings.Based on the virtual assembly of a single bearing,this paper constructs a bearing digital twin model,and analyzes the bulges of the bearing,as well as the pseudo-static and dynamic analysis and simulation of paired bearings,which lays a foundation for the assembly and application of angular contact ball bearings.The main work of this paper is as follows:First of all,based on the real data of the bearing components parameters,constructed corresponding to the actual bearing virtual bearing assembly model,the finished product bearing out amount of actual measurement process in the digital space virtual mapping,and using the model,simulation analysis was carried out on the projection quantity of different influencing factors,compared with the experimental verification,protruding quantity simulation value and measured value maximum error is 20%,The rest are below 15%,which proves the feasibility and accuracy of the digital twin model constructed,and can provide guidance and reference for actual bearing assembly and pairing.Secondly,based on the bearing digital twin model,the mechanical modeling of single bearing and paired bearing was carried out by using quasi-static method.The iterative equation was constructed by using finite difference method,and the model was solved iteratively by Newton-Raphson.The influence of bulges on the dynamic characteristics of bearings was analyzed from the aspects of combined load and structural parameters,and the analytical solutions of load distribution and contact Angle of raceway of rolling body at different azimuth angles were obtained.The results show that the curvature change of inner raceway in single bearing results in a change of bulges.At this time,the contact load curve between the rolling body and raceway presents a w-shaped change with the change of azimuth.The peak value of the curve increases gradually with the decrease of the radius of curvature of raceway.Under the combined load of paired bearings,the rolling bodies of bearings on both sides are not uniformly loaded.If the axial force mainly acts on one row of bearings,it has little influence on the load distribution of the other row.However,with the increase of axial force,the load of the other row of rolling bodies on the raceway will decrease and gradually unload.Finally,due to the limitations of the quasi-static method,the stress level and displacement of raceway or rolling body cannot be analyzed.Therefore,the influence of the protruding amount caused by the size difference on the dynamic characteristics of paired bearings is further studied by the explicit dynamic method.Then,the load distribution and service life of the paired bearing considering the radial clearance difference and contact Angle difference are analyzed,and the control scope of the size difference is summarized,which also lays a theoretical foundation for further improving the success rate of the paired bearing.